Final answer:
The subject of this question is English. The question explores the theme of the color red and blood in different contexts through excerpts from literature, posters, and historical events.
Step-by-step explanation:
The subject of this question is English. The question contains various excerpts that describe scenes or situations involving the color red or blood. These excerpts come from different sources, such as literature, posters, and historical events. The common theme of the color red and blood is explored in different contexts, reflecting various emotions and symbolism.